So, I've searched and searched can't find a straight answer. I know Curt makes a receiver hitch for all e60 except for the M5. Bumper support and other mounting points are the same but, the rear diffuser will udoubtable need cut. Anyone had experience with this? I don't mind cutting the diffuser but, not interested in cutting the bumper. I'd like to keep my Thule rack and like the option of being able to tow R compounds to the track. I was about to order the Curt for an E60 and just get it modified if need be but, any insight would be great.